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Finding the Fourth Proportional to 495,705.16, 684,070.74 and 280,844.76

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Solution

The fourth proportional to 495,705.16, 684,070.74 and 280,844.76 is: 387,564.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,705.16 : 684,070.74 = 280,844.76 : x
  2. Step 2: Convert to fraction form
    495,705.16/684,070.74 = 280,844.76/x
  3. Step 3: Cross multiply
    495,705.16x = 684,070.74 × 280,844.76
  4. Step 4: Simplify right side
    495,705.16x = 192,117,682,798.32
  5. Step 5: Solve for x
    x = 192,117,682,798.32/495,705.16
  6. Step 6: Final answer
    x = 387,564.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.